Qt中如何使窗口隐藏/最小化到托盘

Qt中如何实现自己的托盘功能，Qt自带的demo也很明了，这里我们就来实现自己的一个托盘。。。

功能：窗口最小化后或者点击“hide”按钮将窗口隐藏到托盘。

    通常最小化的窗口会在任务栏上显示一个按钮。当用户按一下这个按钮，窗口就还原了。这是一个被大多数桌面环境，比如Windows，KDE，GNOME所采用的普遍设计。不过，因为任务栏通常只是桌面边上一小行，容纳不了很多按钮，用户通常希望把那些不常用的程序隐藏起来，只在通知栏显示一个小图标，要使用的时候再点击那个小图标恢复窗口。这种作法最典型的例子是QQ和Winamp。

最基本的思路是拦截窗口的最小化事件changeEvent(),通过重写changeEvent()即可。

“hide”按钮的方式，是通过信号--槽来实现。

--------------------------------------------------------------------

  void TrayMenu::createActions()
  {
     //创建托盘项
     action_show = new QAction(this);
     action_quit = new QAction(this);
     action_login_home = new QAction(this);
     action_help = new QAction(this);
     action_about = new QAction(this);
     action_check_update = new QAction(this);
     action_setting = new QAction(this);

 

     //设置托盘项图标

     action_show->setIcon(QIcon(":/icon/open"));
     action_login_home->setIcon(QIcon(":/icon/home"));
     action_help->setIcon(QIcon(":/icon/help"));
     action_about->setIcon(QIcon(":/icon/about"));
     action_check_update->setIcon(QIcon(":/icon/update"));
     action_setting->setIcon(QIcon(":/icon/set"));
     action_quit->setIcon(QIcon(":/icon/quit"));

     //加载图片和提示

QIcon icon(":/images/sysTray.png");
systemTray = new QSystemTrayIcon(this);
systemTray->setIcon(icon);
systemTray->setToolTip("Hello, this is system tray!");

 注意：这里特别提醒，如果你的应用程序要移植到别的机器上，而且这个机器没有装Qt，QIcon的图片格式最好用png，而不要用ico等格式，否则托盘图标不能显示，会很麻烦。

     //设置托盘想文本

     action_show->setText(QString("显示"));
     action_quit->setText(QString("退出"));
     action_login_home->setText(QString("登录网页"));

     action_help->setText(QString("帮助"));
     action_about->setText(QString("关于"));

     action_check_update->setText(QString("检查更新"));

     action_setting->setText(QString("设置"));

 

     //添加菜单项
     this->addAction(action_show);
     this->addAction(action_setting);
     this->addAction(action_login_home);
     this->addSeparator();
     this->addAction(action_help);
     this->addAction(action_about);
     this->addAction(action_check_update);
     this->addSeparator();
     this->addAction(action_quit);

     action_setting->setVisible(false);

 

     //设置信号连接（这里仅列举连接显示窗口的信号）
     QObject::connect(action_show, SIGNAL(triggered(bool)), this, SIGNAL(showWidget()));
 }

 

  LoginDialog::LoginDialog(QWidget *parent) : QDialog(parent)
  {

     QSystemTrayIcon *system_tray = new QSystemTrayIcon();

     //放在托盘提示信息、托盘图标

     system_tray ->setToolTip(QString("我就是托盘"));
     system_tray ->setIcon(QIcon(":/icon/login"));

     TrayMenu *tray_menu = new TrayMenu();
     system_tray->setContextMenu(tray_menu);

     //点击托盘执行的事件
      connect(system_tray , SIGNAL(activated(QSystemTrayIcon::ActivationReason)), this, SLOT(iconIsActived(QSystemTrayIcon::ActivationReason)));
     connect(tray_menu, SIGNAL(showWidget()), this, SLOT(showNormal()));

     //显示托盘
     system_tray->show();

    //托盘显示提示信息

    system_tray->showMessage(QString("托盘标题"), QString("托盘显示内容"));

  }

 

  void LoginDialog::iconIsActived(QSystemTrayIcon::ActivationReason reason)
  {
     switch(reason)
     {
     //点击托盘显示窗口
     case QSystemTrayIcon::Trigger:
      {
        showNormal();
        break;
      }   
     //双击托盘显示窗口
     case QSystemTrayIcon::DoubleClick:
     {
       showNormal();
       break; 
     }            
     default:
      break;
     }
  }

 

  OK，这样我们的托盘功能就Over了！

=============================================================================

另：//关闭到托盘
void Widget::closeEvent(QCloseEvent *e)
{
    e->ignore();
    this->hide();
}

//最小化到托盘
void Widget::changeEvent(QEvent *e)
{
    if((e->type()==QEvent::WindowStateChange)&&this->isMinimized())
    {
        QTimer::singleShot(100, this, SLOT(close()));
    }
}

或者（me）

//点击窗口的“最小化"按钮会调用此函数(系统默认)---已实现
void maxLinksGuard::changeEvent(QEvent * event )
{
    if(event->WindowStateChange)
    {
switch(this->windowState())
{
//点击“最小化”按钮
case Qt::WindowMinimized:
                 this->hide();
this->setWindowFlags(Qt::Tool);//隐藏任务栏上图标
systemTray->show();//显示托盘
systemTray->showMessage(windowTitle(),"Here is system,double click will show!");//提示
event->ignore();
                 break;
           default:
                 break;
        }
    }
}

//托盘图标事件--------已实现
void maxLinksGuard::iconActivated(QSystemTrayIcon::ActivationReason reason)
{
    switch (reason) 
{
//单击托盘
case QSystemTrayIcon::Trigger:
{
if(!this->isVisible())
{
this->setWindowFlags(Qt::Window); //显示之前恢复
showNormal();
}
else
{
hide();
}
break;
}
//双击托盘---貌似不起作用
case QSystemTrayIcon::DoubleClick:
{
if(!this->isVisible())
{
this->setWindowFlags(Qt::Window); //显示之前恢复
showNormal();
}
else
{
hide();
}
break;
}
case QSystemTrayIcon::MiddleClick:
{
break;
}
default: ;
}
}

//点击窗口的“关闭”按钮触发closeEvent事件(关闭应用程序)----已实现
void maxLinksGuard::closeEvent(QCloseEvent *event)  
{  
    if (this->isVisible())  
    {  
QMessageBox::critical(NULL,QObject::tr("Prompt:"),QObject::tr("Are you sure you want to kill/stop the MaxLinksGuard?"));
        event->ignore();  
    }  
    else  
{
event->accept();  
}
        
}  

===========================================================

托盘图标，一个自己脑子出现很久的词，可惜自己都没动手去实现。最近看见的，听见的多了，自己也感兴趣就弄弄了，感觉还蛮简单了。

贴出效果图：

 

 

 

那么多功能，其实就一个类就搞定了，那就是QSystemTrayIcon

 头文件（主要 1.声明菜单相关动作 2.声明系统托盘对象，以及相关托盘槽函数 3.关闭事件）

 #ifndef SYSTEMTRAYICON_H
 #define SYSTEMTRAYICON_H

 #include
 #include
 #include
 #include
 namespace Ui {
     class SystemTrayIcon;
 }

 class SystemTrayIcon : public QMainWindow
 {
     Q_OBJECT

 public:
     explicit SystemTrayIcon(QWidget *parent = 0);
     ~SystemTrayIcon();

     void CreatTrayMenu();
     void CreatTrayIcon();

     QSystemTrayIcon *myTrayIcon;

     QMenu *myMenu;

     QAction *miniSizeAction;
     QAction *maxSizeAction;
     QAction *restoreWinAction;
     QAction *quitAction;

 private:
     Ui::SystemTrayIcon *ui;

 public slots:
     void iconActivated(QSystemTrayIcon::ActivationReason reason);

 protected:
     void closeEvent(QCloseEvent *event);

 };

 #endif // SYSTEMTRAYICON_H

 

 源文件（1.创建上下文菜单 2.创建系统托盘，实现相关功能）---From  Qt  Assistant

 #include

 #include "window.h"

 Window::Window()
 {
     createIconGroupBox();
     createMessageGroupBox();

     iconLabel->setMinimumWidth(durationLabel->sizeHint().width());

     createActions();
     createTrayIcon();

     connect(showMessageButton, SIGNAL(clicked()), this, SLOT(showMessage()));
     connect(showIconCheckBox, SIGNAL(toggled(bool)),
             trayIcon, SLOT(setVisible(bool)));
     connect(iconComboBox, SIGNAL(currentIndexChanged(int)),
             this, SLOT(setIcon(int)));
     connect(trayIcon, SIGNAL(messageClicked()), this, SLOT(messageClicked()));
     connect(trayIcon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
             this, SLOT(iconActivated(QSystemTrayIcon::ActivationReason)));

     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(iconGroupBox);
     mainLayout->addWidget(messageGroupBox);
     setLayout(mainLayout);

     iconComboBox->setCurrentIndex(1);
     trayIcon->show();

     setWindowTitle(tr("Systray"));
     resize(400, 300);
 }

 void Window::setVisible(bool visible)
 {
     minimizeAction->setEnabled(visible);
     maximizeAction->setEnabled(!isMaximized());
     restoreAction->setEnabled(isMaximized() || !visible);
     QDialog::setVisible(visible);
 }

 void Window::closeEvent(QCloseEvent *event)
 {
     if (trayIcon->isVisible()) {
         QMessageBox::information(this, tr("Systray"),
                                  tr("The program will keep running in the "
                                     "system tray. To terminate the program, "
                                     "choose Quit in the context menu "
                                     "of the system tray entry."));
         hide();
         event->ignore();
     }
 }

 void Window::setIcon(int index)
 {
     QIcon icon = iconComboBox->itemIcon(index);
     trayIcon->setIcon(icon);
     setWindowIcon(icon);

     trayIcon->setToolTip(iconComboBox->itemText(index));
 }

 void Window::iconActivated(QSystemTrayIcon::ActivationReason reason)
 {
     switch (reason) {
     case QSystemTrayIcon::Trigger:
     case QSystemTrayIcon::DoubleClick:
         iconComboBox->setCurrentIndex((iconComboBox->currentIndex() + 1)
                                       % iconComboBox->count());
         break;
     case QSystemTrayIcon::MiddleClick:
         showMessage();
         break;
     default:
         ;
     }
 }

 void Window::showMessage()
 {
     QSystemTrayIcon::MessageIcon icon = QSystemTrayIcon::MessageIcon(
             typeComboBox->itemData(typeComboBox->currentIndex()).toInt());
     trayIcon->showMessage(titleEdit->text(), bodyEdit->toPlainText(), icon,
                           durationSpinBox->value() * 1000);
 }

 void Window::messageClicked()
 {
     QMessageBox::information(0, tr("Systray"),
                              tr("Sorry, I already gave what help I could.\n"
                                 "Maybe you should try asking a human?"));
 }

 void Window::createIconGroupBox()
 {
     iconGroupBox = new QGroupBox(tr("Tray Icon"));

     iconLabel = new QLabel("Icon:");

     iconComboBox = new QComboBox;
     iconComboBox->addItem(QIcon(":/images/bad.svg"), tr("Bad"));
     iconComboBox->addItem(QIcon(":/images/heart.svg"), tr("Heart"));
     iconComboBox->addItem(QIcon(":/images/trash.svg"), tr("Trash"));

     showIconCheckBox = new QCheckBox(tr("Show icon"));
     showIconCheckBox->setChecked(true);

     QHBoxLayout *iconLayout = new QHBoxLayout;
     iconLayout->addWidget(iconLabel);
     iconLayout->addWidget(iconComboBox);
     iconLayout->addStretch();
     iconLayout->addWidget(showIconCheckBox);
     iconGroupBox->setLayout(iconLayout);
 }

 void Window::createMessageGroupBox()
 {
     messageGroupBox = new QGroupBox(tr("Balloon Message"));

     typeLabel = new QLabel(tr("Type:"));

     typeComboBox = new QComboBox;
     typeComboBox->addItem(tr("None"), QSystemTrayIcon::NoIcon);
     typeComboBox->addItem(style()->standardIcon(
             QStyle::SP_MessageBoxInformation), tr("Information"),
             QSystemTrayIcon::Information);
     typeComboBox->addItem(style()->standardIcon(
             QStyle::SP_MessageBoxWarning), tr("Warning"),
             QSystemTrayIcon::Warning);
     typeComboBox->addItem(style()->standardIcon(
             QStyle::SP_MessageBoxCritical), tr("Critical"),
             QSystemTrayIcon::Critical);
     typeComboBox->setCurrentIndex(1);

     durationLabel = new QLabel(tr("Duration:"));

     durationSpinBox = new QSpinBox;
     durationSpinBox->setRange(5, 60);
     durationSpinBox->setSuffix(" s");
     durationSpinBox->setValue(15);

     durationWarningLabel = new QLabel(tr("(some systems might ignore this "
                                          "hint)"));
     durationWarningLabel->setIndent(10);

     titleLabel = new QLabel(tr("Title:"));

     titleEdit = new QLineEdit(tr("Cannot connect to network"));

     bodyLabel = new QLabel(tr("Body:"));

     bodyEdit = new QTextEdit;
     bodyEdit->setPlainText(tr("Don't believe me. Honestly, I don't have a "
                               "clue.\nClick this balloon for details."));

     showMessageButton = new QPushButton(tr("Show Message"));
     showMessageButton->setDefault(true);

     QGridLayout *messageLayout = new QGridLayout;
     messageLayout->addWidget(typeLabel, 0, 0);
     messageLayout->addWidget(typeComboBox, 0, 1, 1, 2);
     messageLayout->addWidget(durationLabel, 1, 0);
     messageLayout->addWidget(durationSpinBox, 1, 1);
     messageLayout->addWidget(durationWarningLabel, 1, 2, 1, 3);
     messageLayout->addWidget(titleLabel, 2, 0);
     messageLayout->addWidget(titleEdit, 2, 1, 1, 4);
     messageLayout->addWidget(bodyLabel, 3, 0);
     messageLayout->addWidget(bodyEdit, 3, 1, 2, 4);
     messageLayout->addWidget(showMessageButton, 5, 4);
     messageLayout->setColumnStretch(3, 1);
     messageLayout->setRowStretch(4, 1);
     messageGroupBox->setLayout(messageLayout);
 }

 void Window::createActions()
 {
     minimizeAction = new QAction(tr("Mi&nimize"), this);
     connect(minimizeAction, SIGNAL(triggered()), this, SLOT(hide()));


     maximizeAction = new QAction(tr("Ma&ximize"), this);
     connect(maximizeAction, SIGNAL(triggered()), this, SLOT(showMaximized()));


     restoreAction = new QAction(tr("&Restore"), this);
     connect(restoreAction, SIGNAL(triggered()), this, SLOT(showNormal()));


     quitAction = new QAction(tr("&Quit"), this);
     connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
 }

 void Window::createTrayIcon()
 {
     trayIconMenu = new QMenu(this);
     trayIconMenu->addAction(minimizeAction);
     trayIconMenu->addAction(maximizeAction);
     trayIconMenu->addAction(restoreAction);
     trayIconMenu->addSeparator();//添加隔离符
     trayIconMenu->addAction(quitAction);


     trayIcon = new QSystemTrayIcon(this);
     trayIcon->setContextMenu(trayIconMenu);
 }

转：http://blog.sina.com.cn/s/blog_a6fb6cc90101dddb.html

      http://blog.csdn.net/qivan/article/details/7506306

另可参考：http://www.cnblogs.com/csuftzzk/archive/2013/01/25/2877283.html

http://www.qtcn.org/bbs/simple/?t15361.html

http://blog.csdn.net/learningstone/article/details/7932363

http://hi.baidu.com/sdink/item/85fa00d09864e01ed90e449a